<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .main{
            height: 300px;
            background-color: skyblue;
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            padding: 0 20px;
            box-sizing: border-box;
        }
        .main div{
            width: 100px;
            height: 100px;
            background: #000;
            border-radius: 50%;
            /*float: left;*/
            /*margin: 10px;*/
        }
    </style>
</head>
<body>
    <div class="main">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
    </div>
</body>
</html>
